GOLD STANDARD 100% Casein
GOLD STANDARD 100% Casein scores 92/100 (A grade). Strengths: All ingredients have Grade A evidence.
Scored by the Formulate Research Team · Last reviewed May 2026
Overview: Optimum Nutrition GOLD STANDARD 100% Casein
Optimum Nutrition GOLD STANDARD 100% Casein — powder format. Contains Micellar Casein. Supports: Muscle Building, Recovery.
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Micellar Casein | 28 g |
Other Ingredients
Micellar Casein, Cocoa (Processed with Alkali), Natural and Artificial Flavors, Salt, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Lecithin (Soy), Acesulfame Potassium, Sucralose, Aminogen® (Protease Enzyme Blend)
Recommended Use
Add 1 scoop to 10-12 oz of cold water or milk and mix. Best used between meals, before bed, or any time a slow-digesting protein feed is desired.
Warnings
These statements have not been evaluated by the food and drug administration. This product is not intended to diagnose, treat, cure or prevent any disease. Contains: Milk and Soy (Lecithin).
Frequently Asked Questions
What is Optimum Nutrition GOLD STANDARD 100% Casein's Formulate score?
Optimum Nutrition GOLD STANDARD 100% Casein scores 93 out of 100 (grade A) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Optimum Nutrition GOLD STANDARD 100% Casein worth it?
Optimum Nutrition GOLD STANDARD 100% Casein scores 93/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Optimum Nutrition GOLD STANDARD 100% Casein?
Each serving contains Micellar Casein (28 g). Serving size: 1 scoop (34 g). 53 servings per container.
How do I take gold standard 100% casein?
Add 1 scoop to 10-12 oz of cold water or milk and mix. Best used between meals, before bed, or any time a slow-digesting protein feed is desired.
Who makes GOLD STANDARD 100% Casein?
GOLD STANDARD 100% Casein is made by Optimum Nutrition. See Formulate's full grade and product lineup for Optimum Nutrition on its brand page.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.